Fig. 3. Interaction of endogenous APRO4 with endogenous Src in PC12 cells. (A) Co-immunoprecipitation of endogenous APRO4 with endogenous Src in PC12 cells. The normal mouse antiserum did not immunoprecipitate APRO4. (B) Subcellular localization of endogenous Src and APRO4 in PC12 cells by confocal microscopy. Cells were stained with anti-Src (green) and anti-APRO4 (red). APRO4 co-localized with Src in the cytoplasm (yellow). Bars, 10 µm.